title: Action of penicillin on streptococci; enhancement of sensitivity in vivo?
mesh_terms: D006801:Humans; D010406:Penicillins / Q000494:pharmacology*; D013291:Streptococcus / Q000187:drug effects*
chemical_list: D010406:Penicillins
keywords: PENICILLIN/effects; STREPTOCOCCUS/effect of drugs on